In Django 3.2 before 3.2.25, 4.2 before 4.2.11, and 5.0 before 5.0.3, the django.utils.text.Truncator.words() method (with html=True) and the truncatewords_html template filter are subject to a potential regular expression denial-of-service attack via a crafted string. NOTE: this issue exists because of an incomplete fix for CVE-2019-14232 and CVE-2023-43665.

References

• https://nvd.nist.gov/vuln/detail/CVE-2024-27351
• https://docs.djangoproject.com/en/5.0/releases/security
• https://groups.google.com/forum/#%21forum/django-announce
• https://www.djangoproject.com/weblog/2024/mar/04/security-releases
• https://github.com/pypa/advisory-database/tree/main/vulns/django/PYSEC-2024-47.yaml
• https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/D2JIRXEDP4ZET5KFMAPPYSK663Q52NEX
• https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/SN2PLJGYSAAG5KUVIUFJYKD3BLQ4OSN6
• https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/ZQJOMNRMVPCN5WMIZ7YSX5LQ7IR2NY4D
• http://www.openwall.com/lists/oss-security/2024/03/04/1
• django/django@072963e
• django/django@3394fc6
• django/django@3c9a277